百度试题 结果1 题目What is the atomic number of carbon? A. 6 B. 8 C. 12 D. 14 相关知识点: 试题来源: 解析 A。解析:碳的原子序数是6。选项B,8是氧的原子序数。选项C,12是碳的相对原子质量。选项D,14是硅的原子序数。反馈 收藏
If carbon has an atomic number of 6, and a mass number of 14, how many neutrons are in the atom? Define: the atomic number, atomic mass, and isotopes. What is the atomic number of manganese? a. 25 b. 55 c. 30 d. 80 Distinguish between the atomic number and the mass number of...
What is the chemical formula for carbon tetrafluoride? How many valence shell electrons does the element carbon have? What group does chlorine belong to? What is the oxidation number of carbon? What is the atomic number for carbon dioxide?
What is the atomic mass number of carbon-12? How do you find the atomic mass of an element? How do you find the atomic number of an element? What is atomic number, mass number and isotopes? What is the atomic mass of an element?
(a) What is the number of atoms of carbon per unit cell of diamond? (b) Why diamond is the hardest known substance? (c) What is the value that Sudanshu can derive from these facts? View Solution Silicon crystallises in fcc lattice, a single crystal of high purity like diamond. Gram...
Atomic mass unit is one-twelfth the mass of an atom of carbon-12 (12C), the most common carbon isotope. Nonetheless, the termapproximatematters because the masses of individual atoms in elements -- other than carbon -- are not whole numbers (see above examples). This is because mass is ...
What is the High Electron Density on N in NH3? What is the atomic number of germanium? What is the mass number of argon? What is the density of argon gas (Ar) at 1.42 bar and 13.3^{\circ}C? Express your answer in g/L.
翻译：碳的原子质量是什么？
No matter how many neutrons or electrons it has, an atom with one proton is alwaysatomic number 1and always hydrogen. An atom the contains 6 protons is by definition an atom of carbon. An atom with 55 protons is always cesium. How to Find the Atomic Number ...
12. On Earth, carbon-12 accounts for almost 99 percent of naturally occurring carbon. Scientists use atomic mass units, or amu, to measure the mass of elements. Carbon-12 has an amu of exactly 12.000. This number is the reference standard for measuring the atomic mass of all other ...